New scientific results (theses)
1. I developed a new method based on residence time distribution analysis using computational fluid dynamics and a compartmental model to study
the hydrodynamic behavior of the equipment with complex geometry. The residence time distribution curve obtained by using the heuristic compartmental model is in good agreement with the curve obtained by the detailed CFD model.
a) A three-dimensional CFD simulator of a biomass gasification device is developed, which is suitable for studying residence time distribution of systems with multiple inlets.
b) Using a compartmental model which is based on ideal flow units I showed that the hydrodynamic behavior of the detailed CFD model can be reproduced. With the application of the compartmental model we got a tool for the calculation of the residence time analysis with significantly less computational cost.
Related publications: 6., 10., 18.
2. To evaluate the performance of continuous mixers, I defined a multi-aspect mixing measure and used it to develop an evaluation method. The advantage of the developed method is that in contrary to the traditional simulations based on the solution of the component balance equation, only the stationary velocity field has to be used for the calculations.
a) I developed metrics of mixing to define the mixedness. These metrics are applicable to qualify static and jet mixers.
b) I defined the concept of local coverage, which can be used to qualify the mixer by interpreting the local coverage to the whole outlet boundary.
c) I developed a calculation method that is suitable for determining the mixing performance of mixers based on the position data of the marked phase elements using the stationary velocity field obtained by the flow simulation.
Related publications: 1., 13.
127 3. Models using the immersed boundary method based on the direct numerical simulation modeling approach are developed for particle level modelling of two-phase flow including the phase interactions for different processes such as fluidization, adsorption and sedimentation.
a) A simulator of a two-phase system, including a fluidized particle is developed in which the gas-solid interaction is calculated by the immersed boundary method. The algorithm of the calculation is usable to calculate the moving of a solid particle considering the properties of the surrounding flow field.
b) I developed a particle level model to simulate the adsorption process on the surface of an adsorbent particle. I constructed a flow model of a two-phase system containing the adsorbent particle based on the immersed boundary method. The flow model is completed with a component balance for the component to be adsorbed and first-order kinetics describing the adsorption process. The developed method makes it possible to determine the degree of saturation of the adsorbed components on different surface elements of the particle.
c) I also developed a particle level model based on the immersed boundary method that can calculate the sedimentation of a solid particle in Newtonian fluid. The simulator is suitable to calculate the moving of the solid particle in still fluid based on the properties of the surrounding flow field.
Related publications: 3., 7., 8., 9., 11., 12., 14., 15., 16., 17., 19., 20.
128
Publikációk
Folyóiratcikkek:
1. Gyurik, L., Ulbert, Zs., Molnár, B., Varga, T., Chován, T., Egedy, A., 2020, CFD Based Nozzle Design for a Multijet Mixer, Chemical Engineering and Processing - Process Intensification Vol. 157 /DOI:
10.1016/j.cep.2020.108121/
2. Egedy, A., Gyurik, L., Ulbert, Zs., Rado A., 2020, CFD modeling and environmental assessment of a VOC removal silo, International Journal of Environmental Science and Technology /DOI: 10.1007/s13762-020-02833-7
3. Gyurik, L., Egedy, A., Ulbert, Zs., Cronin, K., Ring, D., 2019, Modelling the Motion of a Single Solid Bead in a Newtonian Fluid by Two-Phase CFD Methods, Chemical Engineering Transactions, Vol. 76., pp. 175-180. /DOI:
10.3303/CET1976030/
4. Egedy, A., Gyurik, L., Ulbert, Zs., Rado, A., 2019, CFD Modelling and Simulation of a VOC Removal Silo, Chemical Engineering Transactions, Vol. 76., pp. 163-168. /DOI: 10.3303/CET1976028/
5. Egedy, A., Gyurik, L., Varga T., Zou, J., Miskolczi, N., Yang, H, 2018, Kinetic-compartmental modelling of potassium-containing cellulose feedstock gasification, Frontiers of Chemical Science and Engineering, Vol. 12., pp. 708-717. /DOI: 10.1007/s11705-018-1767-y/
6. Gyurik, L., Egedy, A., Zou, J., Miskolczi, N., Ulbert, Zs., Yang, H., 2018, Hydrodynamic modelling of a two-stage biomass gasification reactor, Journal of the Energy Institute Vol. 92., pp. 403-412. /DOI:
10.1016/j.joei.2018.05.007/
7. Gyurik, L., Egedy, A., Ulbert, Zs., 2018, Simulation of Gas-Solid Flow in Quasi-Two-Dimensional Fluidized Bed by Immersed Boundary Method, Chemical Engineering Transactions, Vol. 70., pp. 805-810. /DOI:
10.3303/CET1870135/
Konferencia kiadványban megjelent publikációk:
8. Gyurik, L., Egedy, A., Varga, T., Ulbert, Zs., 2020, Two-phase Flow Modelling and Simulation of Gas Purification Column, Proceedings of the 30th European Symposium on Computer Aided Process Engineering (ESCAPE30) Part A, pp. 199-204. /ISBN: 978-0-12-823511-9/
9. Gyurik, L., Egedy, A., Ulbert, Zs., 2018, Modeling Solid-Liquid Settling System as a Two-Phase Flow Problem, COMSOL Conference 2018 Lausanne 6 p
10. Gyurik, L., Egedy, A., Zou, J., Miskolczi, N., Ulbert, Zs., Yang, H., 2017, Hydrodynamic Modelling of a Gasification Reactor, Műszaki Kémiai Napok 2017, pp. 11-16. /ISBN: 978-963-396-094-3/
129 Előadások, poszterek:
11. Gyurik, L., Egedy, A., Varga, T., Ulbert, Zs., 2020, Two-phase Flow Modelling and Simulation of Gas Purification Column, 30th European Symposium on Computer Aided Process Engineering – ESCAPE30 Virtual Symposium, 2020. 08. 30. – 09. 02.
12. Gyurik, L., Egedy, A., Ulbert, Zs., Cronin, K., Ring, D., 2019, Modelling the Motion of a Single Solid Bead in a Newtonian Fluid by Two-Phase CFD Methods, 22nd Conference on Process Integration for Energy Saving and Pollution Reduction - PRES'19, Agios Nikolaos, Görögország, 2019. 10.
20-23.
13. Gyurik, L., Egedy, A., Ulbert, Zs., Diszperzer többcélú optimalizálása numerikus áramlástani szimulációk segítségével, Műszaki Kémiai Napok 2019, Veszprém, 2019. 04. 16-18.
14. Gyurik, L., Egedy, A., Ulbert, Zs., 2018, Modeling Solid-Liquid Settling System as a Two-Phase Flow Problem, COMSOL Conference 2018, Lausanne, Svájc, 2018. 10. 22-24.
15. Gyurik, L., Egedy, A., Ulbert, Zs., 2018, Simulation of Gas-Solid Flow in Quasi-Two-Dimensional Fluidized Bed by Immersed Boundary Method, 21st Conference on Process Integration for Energy Saving and Pollution Reduction - PRES'18, Prága, Csehország, 2018. 08. 25-29.
16. Gyurik, L., Egedy, A., Ulbert, Zs., 2018, Immersed Boundary módszer alkalmazása gáz-szilárd kétfázisú rendszerek modellezésére és szimulációjára, Műszaki Kémiai Napok 2018 Veszprém, 2018. 04. 24-26.
17. Gyurik, L., Egedy, A., Ulbert, Zs., 2018, Immersed Boundary Method for Modelling of Multiphase Flow, Tavaszi Szél Nemzetközi Multidiszciplináris Konferencia 2018, Győr, 2018. 05. 04-06.
18. Gyurik, L., Egedy, A., Zou, J., Miskolczi, N., Ulbert, Zs., Yang, H., 2017, Hydrodynamic Modelling of a Gasification Reactor, Műszaki Kémiai Napok 2017, Veszprém, 2017. 04. 25-27.
19. Gyurik, L., Egedy, A., Ulbert, Zs., 2017, Modelling and Computer-aided Simulation of Gas-solid Two-phase Flows, Tavaszi Szél Nemzetközi Multidiszciplináris Konferencia 2017, Miskolc, 2017. 03. 31. – 04. 02.
20. Gyurik, L., Egedy, A., Ulbert, Zs., 2016, Gáz-szilárd kétfázisú áramlások modellezése és számítógépes szimulációja, XXII. Nemzetközi Vegyészkonferencia, Temesvár, Románia, 2016. 11. 03-06.
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